NWSA - National Wireless Safety Alliance Hoisting and Rigging Practices Questions and Answers

Question 1

According to the ANSI/ASSP A10.48 standard, which of the following is a mandatory component of a rigging plan for a communication structure lift?

Accepted Answer

Operational and non-operational construction loads and limitations

Answer

The ANSI/ASSP A10.48 standard specifies that a rigging plan must include details about the construction loads, both operational and non-operational, and their limitations to ensure the structural stability and safety of the lift.

Question 2

A signal person is communicating with a crane operator to swing the boom to the left. What is the standard OSHA hand signal for this command?

Accepted Answer

Arm extended horizontally, with the index finger pointing in the direction of the swing.

Answer

The standard OSHA and ASME hand signal for swinging a crane boom is to extend the arm horizontally with the index finger pointing in the intended direction of the boom's movement.

Question 3

During a pre-use inspection of a gin pole, a competent person discovers a crack in a weld on one of the leg sections. What is the correct course of action?

Accepted Answer

Immediately remove the gin pole from service until it can be inspected by a qualified person and properly repaired.

Answer

Industry standards and safety regulations mandate that if any cracks or significant defects are found during a gin pole inspection, the equipment must be immediately removed from service. Operations should not resume until a qualified person has inspected the damage and it has been repaired according to the manufacturer's or an engineer's specifications.

Question 4

A rigging crew is preparing to lift a new antenna array that weighs 450 lbs. The synthetic rope being used has a manufacturer's breaking strength of 5,000 lbs. What is the factor of safety for the rope in this lift?

Accepted Answer

11.1:1

Answer

The factor of safety is calculated by dividing the breaking strength of the rope by the working load limit (the weight of the load). In this scenario: 5,000 lbs (Breaking Strength) / 450 lbs (Load) = 11.11. The factor of safety is approximately 11.1:1. Note that while rigging components often require a minimum 5:1 safety factor, synthetic ropes typically require 10:1. This lift exceeds the minimum requirement.

Question 5

Which of the following personnel is ultimately responsible for developing and approving a 'special engineered lift' that falls outside the gin pole's standard load chart?

Accepted Answer

A Qualified Professional Engineer

Answer

When a lift's parameters fall outside of the standard load chart provided by the manufacturer, it is classified as a special engineered lift. Such lifts require specific planning, analysis, and approval from a qualified professional engineer to ensure safety and structural integrity.

NWSA - National Wireless Safety Alliance Practice Test

NWSA - National Wireless Safety Alliance Practice Test

NWSA - National Wireless Safety Alliance Hoisting and Rigging Practices Questions and Answers